nis/common/gethostent6.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 *
 *  nis/gethostent.c -- "nis" backend for nsswitch "ipnodes" database
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <ctype.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include "nis_common.h"
#include <stdlib.h>


static nss_status_t
getbyname(be, a)
    nis_backend_ptr_t   be;
    void            *a;
{
    nss_XbyY_args_t     *argp = (nss_XbyY_args_t *)a;
    nss_status_t    res;

    const char      *s;
    char            c;

    for (s = argp->key.ipnode.name;  (c = *s) != '\0';  s++) {
        if (isupper(c)) {
            char        *copy;
            char        *mung;

            if ((copy = strdup(argp->key.ipnode.name)) == 0) {
                return (NSS_UNAVAIL);
            }
            for (mung = copy + (s - argp->key.ipnode.name);
                (c = *mung) != '\0';  mung++) {
                if (isupper(c)) {
                    *mung = _tolower(c);
                }
            }
            res = _nss_nis_lookup(be, argp, 1, "ipnodes.byname",
                copy, 0);
            if (res != NSS_SUCCESS)
                argp->h_errno = __nss2herrno(res);
            free(copy);
            return (res);
        }
    }
    res = _nss_nis_lookup(be, argp, 1,
                "ipnodes.byname", argp->key.ipnode.name, 0);
    if (res != NSS_SUCCESS)
        argp->h_errno = __nss2herrno(res);
    return (res);
}

static nss_status_t
getbyaddr(be, a)
    nis_backend_ptr_t   be;
    void            *a;
{
    nss_XbyY_args_t     *argp   = (nss_XbyY_args_t *)a;
    struct in6_addr     addr;
    char            buf[INET6_ADDRSTRLEN + 1];
    nss_status_t    res;

    /* === Do we really want to be this pedantic? */
    if (argp->key.hostaddr.type != AF_INET6 ||
        argp->key.hostaddr.len  != sizeof (addr)) {
        return (NSS_NOTFOUND);
    }
    (void) memcpy(&addr, argp->key.hostaddr.addr, sizeof (addr));
    if (IN6_IS_ADDR_V4MAPPED(&addr)) {
        if (inet_ntop(AF_INET, (void *) &addr.s6_addr[12],
                (void *)buf, INET_ADDRSTRLEN) == NULL) {
            return (NSS_NOTFOUND);
        }
    } else {
        if (inet_ntop(AF_INET6, (void *)&addr, (void *)buf,
                        INET6_ADDRSTRLEN) == NULL)
            return (NSS_NOTFOUND);
    }

    res = _nss_nis_lookup(be, argp, 1, "ipnodes.byaddr", buf, 0);
    if (res != NSS_SUCCESS)
        argp->h_errno = __nss2herrno(res);
    return (res);
}


static nis_backend_op_t ipnodes_ops[] = {
    _nss_nis_destr,
    _nss_nis_endent,
    _nss_nis_setent,
    _nss_nis_getent_netdb,
    getbyname,
    getbyaddr
};

/*ARGSUSED*/
nss_backend_t *
_nss_nis_ipnodes_constr(dummy1, dummy2, dummy3)
    const char  *dummy1, *dummy2, *dummy3;
{
    return (_nss_nis_constr(ipnodes_ops,
            sizeof (ipnodes_ops) / sizeof (ipnodes_ops[0]),
            "ipnodes.byaddr"));
}